#include <stdio.h>


void Sum(int n)
{
  int sum = 0;
  int i = 0;
  for(;i < n;i++)
  {
    sum += i;
  }
  printf("%d\n",sum);
}

int main()
{
  int n = 100;
  printf("Hello Linux\n");

  Sum(n);

  printf("good bye\n");

  return 0;
}
